fp-speculation, Qfp-speculation
Tells the compiler the mode in which to
speculate on floating-point operations.
Syntax
Linux:
-fp-speculation
=
mode
Windows:
/Qfp-speculation
:
mode
Arguments
- mode
- Is the mode for floating-point operations. Possible values are:
- fast
- Tells the compiler to speculate on floating-point operations.
- safe
- Tells the compiler to disable speculation if there is a possibility that the speculation may cause a floating-point exception.
- strict
- Tells the compiler to disable speculation on floating-point operations.
- off
- This is the same as specifying strict.
Default
- -fp-speculation=fastor/Qfp-speculation:fast
- The compiler speculates on floating-point operations. This is also the behavior when optimizations are enabled.However, if you specify no optimizations (-O0), the default changes:LinuxIn this case, the default is-fp-speculation=safe.WindowsIn this case, the default is/Qfp-speculation:safe.
Description
This option tells the compiler the mode in which to
speculate on floating-point operations.
Disabling speculation may prevent the vectorization of
some loops containing conditionals.
IDE Equivalent
Visual Studio:
Optimization >
Floating-Point Speculation
Eclipse:
Floating Point >
Floating-Point Speculation
Alternate Options
None